It is a sphenic number, since it is the product of 3 distinct primes.
9999942 is an admirable number.
It is a nialpdrome in base 10.
It is a congruent number.
Almost surely, 29999942 is an apocalyptic number.
9999942 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
9999942 is a wasteful number, since it uses less digits than its factorization.
9999942 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 1666662.
The square root of 9999942 is about 3162.2684895499. The cubic root of 9999942 is about 215.4430524783.
The spelling of 9999942 in words is "nine million, nine hundred ninety-nine thousand, nine hundred forty-two".